Telephone switch



H. MARBURG TELEPHONE swITc-H FiledJuly s; 1924 f which case, thehorizontal conductors may be Patented Dec. 29,) 19.25.

UNITED STATES Pa'rlzrrA OFFICE.

i HANS MARBURG, OF HALENSEIE.,` GERMANY, ASSIGNOR T0 SIEMENS & HALSKE AK.TIENGESELLSCHAFT, A GERMAN COMPANY, 0F SIEMENSS'IADT, NEAR BERLIN,

GERMANY.

Application led July 3,

The invention is particularly adaptable to a switch structure in whichthe vertical conductors are assigned to trunk lines and the horizontalconductors to incoming and outgoing lines. This invention is animprovement on the switches of the type shown in Patent No. 1,515,735,granted'to Charles L. Goodrum et al on November 18,1924, in

used as links and the vertical conductorsassigned to incoming lines andoutgoing or trunk lines. I

The 'object of this invention is to provide a switching device of thetype referred to above in which the electrical connection of a pluralityof conductors is simple and positive in manner, being eii'ected withawipingl action, and to also provide a switching device in which theoperating parts are reliable, cheap to manufacture and readilyaccessible for repairs and replacement.

yses

'Ihe principal feature ofthe invention consists in the arrangement ofcoupling elements or members adjacent to coordinately disposedconductors between which a connec tion may be desired.

Another feature is the arrangement of a stationary insulated bar inwhich there are notched apertures provided for the purpose of limitingthe movement of the couplingmembers.

Another feature is the arrangement of the horizontal' conductors in aplurality of verticalpplanes therebyA providing a greater' capacity thanthe coordinate switch structures heretofore disclosed. c A

Other features of the invention will be clear from the detaileddescription and the appended claims which follow.

With reference to the accompanyin drawing, Fig. 1 is a partial frontassemb y view showing the coordinately disposed conduc- TELEPHONESWITCH.

1924. Serial No. 723,882.

. tors' with their associated coupling members.

Fig. 2 is a cross-sectional elevation view showing ,theY actuatingmechanism for the coupling members.' Fig. 3 'is a plan view of Fig. 2.Fig. 4 is a fragmentary perspective view of the switch structure.

The structure shown consists, in general, of bare wire conductorsarrangedA in sets coordinately disposed to each other. The

conductors 1, 2, 3 and 4 of one set extendhorizontally and parallel toone another and are arranged in two vertical planes, one

behind the other. The conductors '5, 6, 7 and 8 of another set extendvertically and are arranged adjacent to each other and this set islocated in a third vertical plane middistant between the other twoplanes and parallel thereto. The means for establishmg an electricalconnection between the two conductor sets comprises a set of movablecouplingl members'9, 10, 11 and 12, the free ends of which members arebifurcated and" bent out inv planes at right angles to each other, thedistance between the points of bending being equal to the distance-between adjacent 'planes of the conductors. When the coupling membersare. operated the bentout ends of each-engage a pair of coordinatelydisposed conductors4 establishing a 'connection therebetween.

A more detailed description of the invention and its method of operationare as follows:

' The sets of horizontal conductors comprising the wires. 1, 2, 3 and 4and the sets of vertical conductors comprising the wires 5, 6, 7 and 8are securely fastened at their ends to fixed members, not sho-wn, of the'switch structure. The coupling members 9, 10, 11A

and 12consist also of bare wires and these are detachably andinsulatively mounted 1n a* laminated support 15 and are arranged ad- ,4

jacent to one another in a yhorizontal plane, their free en'dsprotruding through the three vertical planes 'of conductors. vEach`coupling member is bentin bifilar formation,

the sides of which may be Awelded togetherv to obtain the desiredresiliency and the free ends are bent out as described above so as toeffect contacts with both coordinate conductors of the pair with whiclIit is associated, when the operating mechanism' is actuated. i

The operating mechanism comprises a support 1d, upper plate 1 8 and alower plate 19,

the entire embodiment being clamped tostrap 24 which, like the rail,extends the full length of the structureandisa fastened at 4 Thelvertical rotatable bar be arranged for preselection, is operated by.

gether by the machine screws which also serve lthe pur ose ofsecurelyfastening the ,coupling mem ers to the support. The support ispendulously mounte to a stationary olding piece 16. by means of stirrups17 which are (pivotally connected to both sides of the hol ng piece andthe support. The connections ofthe stirrups to the support are made tothe `lobes 21 which are integral arts of the plate 18. The holding pieceis detachably suspended from a rail 22 whichv its ends to fixed members.

25,'which may means of a magnet 26 beingenergized and its associatedarmature 27 being attracted. 'Fixedlyatt'ached to said bar is a row ofpositioning pins 28 which are indivi'dualto the horizontal links orsubscribers lines depending upon the type of system to whichy lthisswitch structure is adapted.' On plates v 19 are integrally formedinverted channelshaped lugs 34 to which ,are pivotally at tachedU-shaped links 29 and each of these= links is so arranged as to normallyrest upon one of the pins 28. When thepins 28 von -.the bar are rotated,all the links assoiciated with said pins are yforced upwards and arepositioned in operable relation toA lother pins 30. The second mentionedins are fixedlyl attached to other rotatable ars 31 which are assignedindividually to each of thelink circuits or subscribers lines, as thecase may be, andarranged parallel thereto. l

For the sake of explaining the further operation of'` the switch, it isassumed that the horizontal rotatable bars are assigned individually tosubscribers lines. When a subscriber removes his receiver from the hook'a magnet 33, which is associated with the. rotatable bar 31, assigned'to Athat particularline, is energized and by means of the arma-l .ture32, the bar 31 is rotated and 'the operat ing (pins 30, attachedthereto, are also ro'- tate stated above and this pin, in its rotation,engages said operated link thereby movin the operating mechanism toanroif-norma I position against the tension of spring 40.

This operation will pull the coupling membersV 9, 10, 11 and 12rearwardin the direction of their length to effect contacts with One ofthese operating pins is in 'op-4 erable relation with an operated link29 as .set of conductors 1, 2, 3, 4.

the conductors 4 and v8, 1 and 7 3 and 6 and 2 land 5, respectively,establishing thereby an electrical connection between the subscribersline and a preselected trunk. A

As soon as the connection between the conductor sets is established,.the magnet 26 is deenergized,`the armature 27 released and therota-table bar 26 is restored to normal by the tensioned condition'ofspring 38 to be ready for a subsequent call. i

sociated magnet 33 is deenergiz'ed thereby lreleasing its armature 32,and the rotatable bar '31 is restored to normal bythe operated vvcondition of spring 39. The return of pin 30 to normal releases thevlink 29 which now drops clear of the pin, and the stressed ,con-

dition of'retractile spring40 draws the op.-v

erating mechanism back to its normalposition thereby breaking theconnectionl between the coupling;l members andthe conductors',

In order to release the ,connection the as-A.`

The return of the operating mechanism to itsv normal position iscontrolled by the stop 41 which consists of a bentprojection formedintegrally with plate 18. `This stop is proing the coupling members toagainst the conductors.

At a fixed distance back of the inner row of conductors is located aninsulative bar be thrust ly preventing these members. v

anismis shown in three positions, namely,

' the upper position representing it in itsnormal condition, the middleposition showing it still in its normal condition but with itsassociatedlink 29 positioned by an operating' pin 28, and the lowerposition showing it in its olf-normal condition with its operated linkin engagement with a second operating pin 30-and clear of itspositioning pin 28 any detrimental vibrations .in H

In Fig.. 2, the switch operating lmechvided in order to prevent theoperatingmechanismln its return movement from fgoing beyond its normalposltion and causwhich pin is nowshown 'restored vto .normal indicatingthat the rotatablebar 2,5, to which it is attached is ready 'for asubsequent call.

By first operating two o'f the vertical bars 25 and then one of thehorizontaljbars. 31" v two setsof conductors 5, 6, 7, 8 may be con-'lf'nected together through the lmedium of .a

What is claimed is: A

' 1. In a selective switch, a plurality of sets' free ends projectinginto proximity to the conductors of said sets, and cooperating bars -ofhorizontal conductors arranged'` 1n the',

form of a'quadrilateral beam, a set of vertical conductors arranged tobisect said set of horizontal conductors, a set of coupling membersarranged to intersect said sets of horizontal andvertica-l conductors,yandan operating mechanism pivotally supported and arrangedltormove saidset of coupling1 sets of coordinately .4. In a coordinate switch`structure,- coordinately disposed rotatable bars, sets of conductors, anoperating mechanism pen-dulous-g4 ly supported, a set ofcouplingmembers,

members intoxengagement with said conductor sets.

3. In a coordinate switch structure, sets of conductors coordna'telydisposed, a set of sai sets of conductors, an insulatin embodiment,pivotally suspended in whic said set of coupling membersl 1s detachablymounted, a link pivotally connected to said: embodiment, a` rotatableoperatingbar, a

positioning in'on said operating bar, a sec-v ond rotatab e operatingbar, an operating pin on said second bar, means for operatin the firstmentioned :bar to rotate the sai positioning pinthereby positioning thesaid link in operative relation to.' the said operating pin, and meansfor voperating ,the said second bar to rotate the said operating pinthereby engaging said link to swingthesaid embodiment to effect aconnection lbe'` tween said Set fof cou ling'members and Said- 'sposedconductors.

and means for rotating sai rotatable' bars toswing said operatingmechanism 'to efectf an engagement between said set of coupllngl membersand said sets of conductors.

l5. In a coordinate switch structure, a horij zontal operatingA bar, a'vertical operatmg' bar, a set of horizontalconductors, a set of `anism,a b1 vertical conductors, an operating mechanism members su orted bysaid operating mechi Pilrcated end on each of said .4 coupling members,and means -for actuating i counling members coordinately disposed to .YY

horizontal rotatable bar, a vertical rotatable said rotatable bars insequential order to I effect engagement between said set of couplingmembers and said sets of conductors,-

and an insulative bar common to a lurality of sets of coup ing membersand notch for eac coupling member of said sets to member. v Y

7. In a coordinate switch structure,`a

bar, a set of horizontal conductors, a set of vertical conductors, anoperating-mechanism .pendulously supported, a yset of coupling membersfixedly attachedto said operating mechanism, means. for rotatin thevertical operatlng bar primarily'and t e horizontal aving Ya preventvibrations ofthe couplirjl p operating barseoondarily (to swing saidoperating mechanism to effect connection between sa'd set of couplingmembers and lsaid. con uctor sets, andan insulative bar having notchedapertures for the said set of i couphng members to prevent ydetrimentalvibrations of the said set of coupling members when the said connectionis broken or when the switch structure is shaken.' v

8.111 a coordinate switch structure7 operf ating bars coordina-tlydisposed, a set of horizontal conductors arranged in :the form of aquadrilateral beam, a set'of vertical conductors arranged to bisect saidset of horizontal conductors a set of coupling members arranged tointersect said sets of horizontal, andl vertical conductors and ansupported,V

operating mechanism pivotally and arranged under the conjolntA operationof said operating bars to swingsaid set of..

conductory sets.

' coupling members into engagement with said "i In witness WheI'Of, Ihereunto subscribe4 'my me this 24th day of May A. n., 1924.- f

t y A.alarmasMARBURG. v

a conductor in each of said horizontal and l

